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SAW SET. 1 N0.3-os,127. Patented Aug-5,1884.-

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'UNITED STATES PATENT einen.

CHARLES CROISSANT, OF ALBANY, NEW YORK.

SAW-SET.

SPECIFICATIQN forming part of Letters Patent No. 303,127, dated August 5, 1884.

Application filed January 2, 1384'. (No model.)

To lz/ZZ whom muy concern.

Be it known that I, CHARLES ColssANr, a citizen of the Unitedv States, residing in the city and county of Albany, and State of New York, have invented certain new and useful Improvements in Saw-Sets, of which the following is a specification.

My invention relates to certain improvements in saw-sets for which Letters Patent No. 129,892were issued to Conrad Keller, July 30, 1872; and it consists inthe combination of' devices hereinafter particularly described and set forth.

The objects of my invention are, iirst, to provide means by which two teeth of sawseither iine or coarse saws-may be operated upon and set at each operation of the tool;

second, to provide means by which boththe presser-foot (for holding the saw at any preferred incline or plane) and its adj listing-screw will be securely held from shifting when adjusted and set; third, to provide means by which the device for gaging the length of the set of the teeth may be automatically adjusted and securely held to the point adjusted to. l accomplish these objects by means of the mechanism illustrated in the several views of the accompanying drawings, in which similar letters of reference indicate like parts.

In the drawings, Figure l represents aside elevation of a saw-set embodying my inprovements. Fig. 2 is a horizontal sectional view taken at line No. l, in Fig. 1. Fig. Sis avertical sectional view taken at line No. 2 in Fig. 2. Fig. fi is a sectional view taken at line No. 3 in Fig. 2. Fig. 5 is a sectional view taken at line No. et in Fig. 3. Fig. 6 is a sectional plan view taken at line No. 5 in Fig. 3; and Fig. 7 is a perspective view of the movable tooth-set.

ln the drawings', A represents the upper jaw of the tool, and A is its attached handle. B is the lower jaw, and B is its attached handle. These jaws and their handles are united together and held by the pivot-screw c in the usual manner. A spring, b, is provided for throwing the handles and jaws apart.

Made in jaw A, from its lower side, is the oblong recess c, as shown in Figs. 2 and 3. This recess is made with a vertical extension of one-halter' one inch, more or less, accord- Vplane of the upper side surface of its top wall,

as shown by full lines in Fig. 3, and indicated by dotted lines in Fig. 4.

Fitted snugly in recess c, and at one end thereof, is the stationary and hardened-steel tooth-set C. Nicely tting in said recess, so as to be movable therein, is a second tooth-set, G, also made of steel and hardened, and made with the saine dimensions and form as toothset C, and substantially as illustrated in Fig. 7, with their lower or set end portions having an angular form, and their upper end portions entering recess c, with a squared form. ThisV second and movable tooth set, C', is pierced in its upper or shank end, from side to side, with a screw-threaded hole, e. The jaw A is pierced in one of its end walls of recess c with a plain hole, f, and on a horizontal line corresponding with the line of the screw-threaded hole in the shank oftooth-set C when in place in recess c of jaw A.

vD is an adjusting-screw provided with a thumb-head, d, screw-threaded stem d', and an annular groove, da, made in the neck of the screw between its screw-threaded stem and head, as shown in Figs. 2, 3, and Li. The jaw A is pierced with a vertical hole, u, which intersects with a side of holef made in the end wall of recess c. The movable tooth-set C is placed in recess c of jaw A, and adjustingscrew D is passed through holef and screwed into the screw-threaded hole e, made in said movable tooth-set, until its end strikes against the iined tooth-set C, when pin m will be inserted in hole n and made to engage with annular groove d?, made in the neck of adjusting-screw D, as shown, when said screw will be adapted to carry movable tooth-set C in either direction toward or from iixed toothset C, according as said screw is turned.

Entering forward from the upper portion of jaw A is arm g,which is pierced with ascrewthreaded hole. (Indicated by dotted lines h in Fig. l.) Into this screw-threaded hole works IOO Y screw from shifting.

an adjusting-screw, E, having presser-foot@ sets to be given to their teeth may be unipivoted to its lower end, as shown. Jamnuts j j are also provided on screw E, the upper one, j, for hoding with arm y,for preventing said screw from turning` after being adjusted longitudinally, and the other, j', for holding foot i fromA turning on the pivot end og said screw when said foot has been adjuste Siecuredin lower j aw,B,is the anvil-block F, which is made of steel and hardened; This block is arranged vertically below the toothsets C C in upper jaw, A, and with a length about equal to the length of recess c, in which tooth-sets G C are placed.

Made with the lower side of jaw B are ears k la', which are pierced with plain holes,whioh receive.adjusting-screw G.

Between ears k 7c is the recess or notch Z, made with plain upper side bearing-surface,s.

' Arranged in this recess or notch Z is adjustable gage H H, connected vby arms H H to shank H2, which shank is pierced with screwthreaded hole o,corresponding with the screwthread of screw G, and through which this screw works after passing through ear k. The rear end of this screw pivots in rear ear, 7c', and has its end riveted down for holding the The arms H H clasp the outer sides of jaw B, while the upper side of shank H2 has bearing against the fiat bearing-surface s at top of recess Z. W'ith this form of construction of parts the gaging parts H H will be firmly held from changing or shifting their positions and situations in relation. to the anvil-block F when set by the adjusting-screw, as the united operations of adjusting-screw G and the bearing of the plane surface of the shank against the plane surface s of recess l will hold said gaging-pieces hrmly from shifting or canting in either direction.

By means of the tooth-set adjusting-screw D injaw A movable tooth-set C may be set nearer to or farther from fixed tooth-set C, so as to adapt the tool to operate with two teeth of a line-toothed saw or a coarser-toothed saw, as may be required. l

By means of the presser foot adjustingscrew E and jam-nuts j j presser-foot i' may be raised or lowered in 4 relation to the plane of the top surface of anvil-block F, and be securely held from shifting, so that saws of different thicknesses and requiring different formly operated with after the pressing-foot has been adjusted and secured.

By means of adjusting gage-screw G, pierced l. In a saw-set employing pivoted handled jaws, the combination, with anvil-block F, secured to one of the jaws, of a fixed tooth-set, movable tooth-set, and the mechanism above described for adjusting the latter tooth-set nearer to or farther from the former, for the purpose set forth.

2. The combination, with jaws A, provided with oblong recess c and fixed tooth-set C, of movable tooth-set C, pierced with a screwthreaded hole, adj Listing-screw D, and holdingpin m, inserted in said jaw and working in annular groove cl2, made in the neck of said adjusting-screw, substantially as and for the purpose set forth.

3. The combination, with screw-threaded armk g, adj Listing-screw E, and pressing-foot i,

of jam-nuts jj', substantially as and for the vided with one or more tooth-sets and the other with an anvil-block, as above described, the combination and arrangement of adjust able gage H H, connected., by arms H to thc screw-threaded pierced shank HZ, with the ad- Y justing-screw G, working loosely in ears k k,

made with the anvil-block jaw, and into the screw-threaded hole in shank H2, for moving the latter within the recess between ears 7c le', and adjusting and holding the gage nearer or farther from the line of the front corner of the tooth set or sets and the front side of the anvil-block, all substantially as and for the operations and purposes set forth.

'CHARLES GROISSANT.

NTitnesses:

Ricrmanl?. DUMARY, ALEX. SELKIRK.

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